Tension for warp-threads.



Patented Oct. 24,- [899.

W. E. FISCHER, G. F. KUETT 8:. C. FISCHER. TENSION FOR WARP THREADS.

(Application filed Apr. 21, 1899.)

(No Model.)

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' NiTEn STATES WILLIAM E. FISCHER, GEORGE F. KUETT, AND CHARLES FISCHER, OF PATERSON, NEW JERSEY.

TENSION FOR WARP-THREADS.

SPECIFICATIOK forming part of Letters Patent No. 635,533, dated October 24, 1899.

Application filed April 21, 1 8 9 9-- To aZZ whom it mayponcern:

Be it known that W6,WILLIAM E. FISCHER, GEORGE F. KUETT, and CHARLES FISCHER, citizens of the United States, residing at Paterson, in the county of Passaic and State of New Jersey, have invented a new and useful Tension Apparatus for Warps, of which the following is a specification.

During the weaving operation it is necessary to the production of perfect cloth that the warp-threads be let off or delivered from the warp-beam under an even and uniform tension. It is also desirable that the parts shall be of simple construction, yet readily admit the taking out of one beam and substitution of another, and that the tension on the warp-beam shall be easily and automatically adjusted to respond to the demands of other portions of the loom structure during operation, to the end'that While it shall let off the amount of Warp desired the tension on said warp will not be materially changed.

With these general Objects in view our. invention relates to that type of let-off devices wherein a friction-strap passing around the flanges of the beam imparts thereto the re quired friction under the control of the warpthreads; and our invention consists of the parts and combinations, as hereinafter particularly described, and definitely pointed out in the claims.

In the drawings, to which reference may be had, Figure 1 is a side elevation of our device, showing a part of the loom-frame in section and the threads being delivered from the beams. Fig. 2 is an end view of the parts shown in Fig. 1, with portions of the tension device omitted from the upper and middle beams to more clearly show the structure of the details. Fig. 3 is a detail side view of one of the beams and a portion of the supportingstand, some of the parts being shown in section. Fig. 4 illustrates an old type of let-off, showing the manner of passing the warpthreads from the beam over and under the tension-rollers. Fig. 5 is a part-sectional detail, on an enlarged scale, showing the connection of parts to be described. Figs. 6 and 7 are detail views, in plan and side elevation, of the tension-lever and its supported roller. Fig. 8 is a detail view of parts shown by Fig.

Serial No. 713,924. (No model.)

5, showing the roller in section. Fig. 9 represents in detail a slight modification in the means for raising the roller and plate.

Suitably secured to the loom-frame in desired position to receive the Warp-beams 2, 3, and iars the upright stands 1, provided at intervals with supporting-sockets 5 for the shafts of said beams. The number of such sockets may be varied to suit the number of beams used. Projecting from the stands 1 are pins 16, adapted to receive and support the perforated end 22 of the tension-frames 6, which are made in a general U shape and have spring-arms connected by the cross-piece 13, on which weights .7 are adapted to be placed, as fully appears from Figs. 1, 6, and 7. To place the tension-frames in position, it is only necessary to slightly compress the free ends of the spring-arm and position holes 22 opposite pins 16 on stands 1, whereupon the resiliency of the arms will causethem to engage the pins 16 and thereafter hold said tension-frame in place. It will be noted that an extra pin 16 is shown near the bottom of stands 1 in Figs. 1 and 2, and these are for the purpose of changing the position of the tension-frames when desired, such extra pins being also present in connection with the beams 2 and 3, but purposely omitted from the illustration in order to avoid confusion with other parts presently to be described. Between the spring-arms of each of the tension-frames 6 are supported, to freely rotate, the rollers 9.

Grouped around the bearings or sockets 5 for eachwarp-beam in the stands 1 is a series of. holes 11, 12, and 14, adapted to receive the ends of and support a rod 10, Fig. 2. This rod is of uniform dimensions from end to end and preferably extends across the entire loomframe, being readily interchangeable in the holes 11, 12, and 14 at will and for a purpose that will presently appear.

The warp-beams are preferably provided each with a head formed with a groove d, in which rides a roller-plate 15, hearing in said groove in a manner clearly disclosed in Fig. 5-that is to say, only the end portions of the plate engage the groove. Carried on a pin 27, which is free to rotate in suitable bearings in roller-plate 15, is a roller 8, turning loosely on said pin, the ends 28 of the pin being turned down, forming a shoulder p, to prevent accidental removal, as will be clearly apparent from Fig. 8. To one end of rollerplate 15 is connected the strap 18 by means of the hole 19 in the plate, which is engaged by a link 31, which is itself engaged by a hook on the end of the strap 18. The opposite end of the strap is provided with a hook 17, Fig. 3, adapted to engage the rod 10 above referred to. It will now be obvious that the adjustment of rod 10 into the different holes 11, 12, and 1 1 in the stands 1 will cause the strap 18 to engage more or less surface of the beamhead and will to that extent vary the frictional energy with which the strap will tend to retard rotation of the beam. By making the rod 10 of generally uniform dimensions the hook 17 will readily change its position on the rod to accommodate beams of varying length. This feature is one that commends itself readily to those practically skilled in the art, as it obviates the objectionable binding action that takes place between the friction-strap and the varying-sized beams when the end of the strap is fixedly connected and not susceptible of adjustment. This binding action present when the end 17 of the strap is fixed causes serious interference with the tension on the warp, and where several beams are simultaneously being used, as represented in Fig. 1, this objectionable feature becomes more pronounced by causing the tension on the warp coming from one beam to vary greatly from that of another, all of which objections are readily overcome by the construction and connection of rod 10 and hook 17.

In the end of the roller-plate opposite the hole 19 there is provided another hole 20, to which may be connected a tension-weight 21, Fig. 3, if greater friction is desired upon the beam-heads. Such weight 21 can be used or not, as circumstances may dictate.

Mounted above the stands 1 and in position to guide the warp-threads 26 as they are delivered from the beams are a series of rollers 23, having loose hearings in brackets 24, secured to the loom-frame 25.

The warp -threads from the beams are passed over the rollers 8, carried by the rollerplates 15, then down and under the rollers 9 on the tension-frames t, and thenceup over guide-rollers 23, as appears in Fig. 1. The effect of this is that the warps comiu g from rollers S tend to press the roller-plate 15 and friction-strap 18 upon the beam-head, and being directly acted on by the tension-frame 6 as they pass beneath the rollers 9 they tend to regulate their own tension. Should the frictioual tendency of strap 18 and plate 15 become too great, however, the tension-frame 6 will be raised by the warps as they pass to rollers 23, and the side arms of the tension-frame coming in contact with the projecting ends 28 of the pin 27 will tend to raise said pin and the plate 15 to thereby relieve the excessive friction of strap 18 and plate 15 to permit the beam to more freely rotate, and as the tension is thus relieved the tension-frame 6 will descend and restore the frictional engagement of the roller-plate 15 and strap with the beamhead. i

It will be noted that in our invention the warp is passed from the top of the beam over to the top of roller 8 in stead of from the bottom of the beam, as shown in Fig. 4, and this for the purpose of lessening the pressure of the plate 15 in the groove of the beam-head due to the action of the warp 26. This removal of pressure has the effect of causing the fric tion-strap 18 to rest more lightly in the groove of the beam and the latter to be more sensitive to slight pulls upon the Warp. The advantages of on r arrangement are that itcauses a more steady and uniform movement of the warp 26 as it passes to the loom from the rolls 23 and obviates the pulls and jerks incident to the let-off of old construction.

By the term normally supported as used in the claims we mean the warps are being drawn from the beam without excessive strain.

In the modified structure shown by Fig. 9 the roller 8 is supported in the roller-plate 15 by a pin 34, fast to said roller, instead of by the loose pin before described, and the plate 15 is provided with a pin 33, which is engaged by the arms of tension-frame 6 as the latter is caused to rise under excessive tension on the warp-beam.

The roller-plates 15 and parts carried thereby can be readily thrown back out of the way by simply releasing the tension on the warp inraising tension-frames 6.

Having thus described our invention, what we claim, and desire to secure by LettersPatcut, is-

1. The combination of a warp-beam, a friction-strap passing around said warp-beam, a roller-plate connected to one end of the friction-strap and carrying a roller, said plate resting on said beam and normally supported solely by the friction-strap to retard but not prevent rotation of said beam.

2. The combination of a warp-beam, a friction-strap passing around said beam, a rollerplate connected to one end of the friction strap and carrying a roller, said plate resting on said beam and normally supported solely by the friction-strap to permit restrained rotation of said beam, and a tension-frame under control of the warp-threads.

3. The combination of a warp-beam, a friction-strap passing around said beam, a rollerplate connected to one end of the frictionstrap, a loosely-111 ounted roller carried by said plate and having a supporting-pin projecting beyond said plate, said roller-plate resting on said beam and normally supported solely by the friction-strap to permit restrained rotation of the beam, and a tension-frame under control of the warp-thread and adapted to be raised by undue tension thereon to engage the projecting ends of the roller-supporting pin.

4. The combination of the warp-beam, a friction-strap passing around the same, a roller-plate connected to one end of the friction-strap, a loosely-mounted roller carried by the roller-plate, said roller-plate resting on said beam and normally supported solely by the friction-strap to permit restrained rotation of the beam, a tension-frame carrying a roller, the warps being passed from the top of the warp-beam, over the roller carried by the roller-plate and under the roller of the tension-frame.

5. The combination of the warp-beam, a friction-strap passing around said beam, and carrying a roller-plate at one end bearing on said beam, a rod supported and extending below the beam, and a sliding connection between the rod and friction-strap, whereby the latter may adjust itself to variations in the length of beams.

6. The combination of the stands, a warp beam carried thereby, afriction-strap passing around said warp-beam, a series of holes in each of said stands, and a rod to which one end of the friction-strap is connected, said rod adapted to be adjusted to and supported by said series of holes in the stand.

7. The combination of a warp-beam, a friction-strap passing around said beam, a rollerplate connected to one end of said strap and resting on the warp-beam, said roller-plate being normally supported solely by said friction-strap to permit retarded movement of the beam and means for detachably connect-- :ing weights to the roller-plate.

8. The combination of a Warp-beam, a friction-strap passing around the same, a rollerplate carrying a loosely-mounted roller and bearing on said warp-beam, said roller-plate being normally supported solely by the said strap to permit retarded movement of the WILLIAM E. FISCHER, GEORGE F. KUETT. CHAS. FISCHER.

Witnesses:

C. SHRIGLAND, J. F. MASTERTON. 

